Mr. Gasket Header Bolts

4.16 out of 5 stars 44 Customer Reviews

Installing headers can sometimes be a real pain, due to the tight spaces and the location and shape of the tubes. Mr. Gasket can help make installation a little easier and also help prevent annoying exhaust leaks from under-tightened header bolts. They have both the socket-head and hex-head styles of header bolts available. Hex types are heat-treated Grade 5 steel and have smaller-than-standard heads to ease access in tight spaces. Socket-head bolts are made from stronger Grade 8 steel for added ruggedness and they're great for those really difficult-to-reach spots. Both styles have a protective black oxide finish.

Results 1 - 14 of 14

Mr. Gasket Header Bolts 918G

Header Bolts, Hex Head, 8mm x 1.25 Thread Size, Steel, Black Oxide, 0.984 in. Underhead Length, Chevy, Small Block LS, Set of 12

Part Number: MRG-918G

4.75 out of 5 stars ( 4 )

Estimated Ship Date: Monday 8/4/2025

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Estimated Ship Date: Monday 8/4/2025

Mr. Gasket Header Bolts 917

Header Bolts, Hex Head, Steel, Black Oxide, 3/8 in.-16, 1.000 in. U.H.L., Set of 12

Part Number: MRG-917

4.5 out of 5 stars ( 6 )

Estimated Ship Date: Monday 8/4/2025

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Estimated Ship Date: Monday 8/4/2025

Mr. Gasket Header Bolts 976

Header Bolts, Hex Head, Steel, Black Oxide, 5/16 in.-18, 0.750 in. U.H.L., Chrysler, Small Block, Set of 14

Part Number: MRG-976

5.0 out of 5 stars ( 1 )

Estimated Ship Date: Monday 8/4/2025

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Estimated Ship Date: Monday 8/4/2025

Mr. Gasket Header Bolts 3420G

Header Fasteners, Bolts, Allen Head, Steel, Black Oxide, 3/8 in.-16, .750 in. UHL, Set of 12

Part Number: MRG-3420G

3.27 out of 5 stars ( 11 )

Estimated Ship Date: Monday 8/4/2025

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Estimated Ship Date: Monday 8/4/2025

Mr. Gasket Header Bolts 2210G

Header Fasteners, Bolts, Hex Head, Stainless Steel, Chevy, Chrysler, Pontiac, Set of 12

Part Number: MRG-2210G

5.0 out of 5 stars ( 1 )

Estimated Ship Date: Monday 8/4/2025

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Estimated Ship Date: Monday 8/4/2025

Mr. Gasket Header Bolts 915

Header Fasteners, Bolts, Hex Head, Steel, Black Oxide, Chevy, Chrysler, Pontiac, Set of 12

Part Number: MRG-915

4.75 out of 5 stars ( 4 )

Estimated Ship Date: Monday 8/4/2025

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Estimated Ship Date: Monday 8/4/2025

Mr. Gasket Header Bolts 919G

Header Bolts; Hex Head; 0.375 in.-16 x 0.75 in.; 16 pc.

Part Number: MRG-919G

Not Yet Reviewed

Estimated Ship Date: Monday 8/4/2025

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Estimated Ship Date: Monday 8/4/2025

Mr. Gasket Header Bolts 970G

Header Bolts, Hex Head, 8mm x 1.25 Thread Size, Steel, Black Oxide, 0.984 in. Underhead Length, Dodge, Ford, Set of 17

Part Number: MRG-970G

4.67 out of 5 stars ( 6 )

Estimated Ship Date: Monday 8/4/2025

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Estimated Ship Date: Monday 8/4/2025

Mr. Gasket Header Bolts 916

Header Fasteners, Bolts, Allen Head, Steel, Black Oxide, Chevy, Chrysler, Pontiac, Set of 12

Part Number: MRG-916

4.25 out of 5 stars ( 4 )

Estimated Ship Date: Monday 8/4/2025

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Estimated Ship Date: Monday 8/4/2025

Mr. Gasket Header Bolts 978G

Header Fasteners, Bolts, Allen Head, Black Oxide, Steel, 8mm x 1.25 Thread, 25mm Length, Set of 16

Part Number: MRG-978G

5.0 out of 5 stars ( 3 )

Estimated Ship Date: Monday 8/4/2025

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Estimated Ship Date: Monday 8/4/2025

Mr. Gasket Header Bolts 917A

Header Bolts, Hex Head, Steel, Black Oxide, 3/8 in.-16, 1.000 in. U.H.L., Set of 100

Part Number: MRG-917A

Not Yet Reviewed

Estimated Ship Date: Aug 25, 2025 if ordered today

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Estimated Ship Date: Aug 25, 2025 if ordered today

Mr. Gasket Header Bolts 2211G

Header Fasteners, Bolts, Hex Head, Stainless Steel, Chevy, Ford, Buick, Set of 16

Part Number: MRG-2211G

2.33 out of 5 stars ( 3 )

Estimated Ship Date: Monday 8/4/2025

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Estimated Ship Date: Monday 8/4/2025

Mr. Gasket Header Bolts 3409

Header Fasteners, Bolts, Hex Head, Steel, Black Oxide, Chevy, Chrysler, Pontiac, Set of 12

Part Number: MRG-3409

5.0 out of 5 stars ( 1 )

Estimated Ship Date: Monday 8/4/2025

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Estimated Ship Date: Monday 8/4/2025

Mr. Gasket Header Bolts 915A

Header Bolts; Hex Head; 0.375 in.-16 x 0.75 in.; 100 pc.

Part Number: MRG-915A

Not Yet Reviewed

Estimated Ship Date: Dec 5, 2025 if ordered today

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Estimated Ship Date: Dec 5, 2025 if ordered today

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